child vs tyke

child and tyke both are nouns.

Word	Noun	Adjective	Verb	Adverb
child	Yes	No	No	No
tyke	Yes	No	No	No

As nouns, child and tyke are synonyms defined as:

Other synonyms of child include fry, kid, minor, nestling, nipper, shaver, small fry, tiddler, tike, youngster.

child (noun)	tyke (noun)
a young person of either sex	a young person of either sex
a human offspring (son or daughter) of any age	a crude uncouth ill-bred person lacking culture or refinement
an immature childish person
a member of a clan or tribe